package homework_03.home_01;

public class HomeWork_01 {
    public static void main(String[] args) {
        int k=1;
        for (int i=1;i<=4;i++){
            for(int j=1;j<=i;j++){
                System.out.print(k);
                k++;
            }
            System.out.println();
        }
    }
}
